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Cod sursa(job #95619)
#include<fstream>
using namespace std;
unsigned long int n;
unsigned long int a[250001];
unsigned long int stramos(unsigned long int p,unsigned long int q){
unsigned long int s=a[q];
while(p--){
if(s<=n && s!=0) s=a[s];
else return 0;
}
return s;
}
int main(){
unsigned long int m,i,p,q,s;
ifstream f("stramosi.in");
f>>n>>m;
for(i=1;i<=n;i++)
f>>a[i];
ofstream g("stramosi.out");
for(i=1;i<=m;i++){
f>>q>>p;
s=stramos(p-1,q);
g<<s<<endl;
}
g<<endl;
f.close();
g.close();
return 0;
}